About Sewage treatment plant
Joseph Ellul (5 Dolce Vita Corte, Triq San Mikiel, San Gwann, SGN 2303, Malta). We run this site and pass each enquiry to drainage engineers covering the enquirer's area.
Why this site exists
We read 28 providers' own pages on 28 October 2026 and only 5 of them print a figure, so the only way to see the spread is to read all of them and show the working. That is what this site is: one table, every source named, dated.
Who it is for
Homeowners off mains drainage, most often replacing a septic tank, who want to know what a sewage treatment plant costs before they ask.
What is on this site
One question, "sewage treatment plant", answered with a quote form that works on the page with no account, 5 guides on the questions around it, a data table you can cite (the figures and their method), and the sources every figure rests on.
- UK Sewage Treatment Plant Price Index: every published price: Every provider we read that publishes a figure for sewage treatment plant, what it publishes, and the day we read it. 6 of 28 read.
- Who publishes a price, and who makes you ask: 5 of 28 providers read for sewage treatment plant publish a figure. These are the ones that do not.
- Sewage treatment plant cost: what UK sellers publish for the unit: Sewage treatment plant cost, supply only: a 6 person plant is a median £2,196 ex VAT across UK sellers' own pages, read 28 October 2026, from £1,430 + VAT.
- Sewage treatment plant installation cost: every stage, priced: Sewage treatment plant installation cost by stage: Premier Tech puts the installation at £6,000 to £11,000 and a whole project at usually £8,000 to £15,000.
- Replacing a septic tank with a sewage treatment plant: the rules: When a septic tank must be replaced with a sewage treatment plant in England: the general binding rules, the 5 cubic metre limit and the 12 month timescale.
What it does not do
- No ranking, no best-of list and no scores: the table is sorted by the figure, not by us.
- No paid placement, no affiliate links and no sponsored rows.
- No invented figure: a provider that publishes nothing is listed as publishing nothing.
Who answers for it
Joseph Ellul-Turner, the person who runs this site.
Reach us
Contact for a question about the site, or enquiries@sewagetreatmentplantcost.co.uk. The legal terms are on Terms and Privacy.
Sewage treatment plant cost is a free introduction service operated by Joseph Ellul (5 Dolce Vita Corte, Triq San Mikiel, San Gwann, SGN 2303, Malta). We pass your details to drainage engineers covering your area, who quote you directly; we may receive a fee from them, and you pay nothing and are under no obligation. We do not supply or install plants. Every figure is read from the named seller's or publisher's own public page on the date shown and is what it publishes, not a quote for your property. The rules summarised here are the Environment Agency's for England, read on gov.uk; they are not legal advice.